import java.util.Scanner;

public class m {
    public static void main(String[] args){
        Scanner scanner =new Scanner(System.in);
        int n = scanner.nextInt();
        System.out.println("c");
    }
    public static int c(int n){
        int sum=0;
        int num=1;
        for (int i=1;i<=n;i++){
            num*=i;
            sum+=num;
        }
        return sum;
    }
}
